suavizar
A. -transitive verb
1. (=alisar) to smooth out, smooth down
2. (=ablandar) (generally) to soften
[+carácter] to mellow
[+severidad, dureza] to temper
[+medida] to relax
3. (=quitar fuerza a)
[+navaja] to strop
[+pendiente] to ease, make more gentle
[+color] to tone down
[+tono] to soften
B. -pronominal verb to soften